var menuOffX=0	//菜单距连接文字最左端距离
var menuOffY=18	//菜单距连接文字顶端距离
var fo_shadows=new Array()
var linkset=new Array()
var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1
var ns6=document.getElementById&&!document.all
var ns4=document.layers
function openScript(url, width, height){
    var Win = window.open(url,"openScript",'width=' + width + ',height=' + height + ',resizable=1,scrollbars=yes,menubar=no,status=no' );
}
function showmenu(e,vmenu,mod){
    if (!document.all&&!document.getElementById&&!document.layers)
        return
    which=vmenu
    clearhidemenu()
    ie_clearshadow()
    menuobj=ie4? document.all.popmenu : ns6? document.getElementById("popmenu") : ns4? document.popmenu : ""
    menuobj.thestyle=(ie4||ns6)? menuobj.style : menuobj

    if (ie4||ns6)
        menuobj.innerHTML=which
    else{
        menuobj.document.write('<layer name=gui bgColor=#E6E6E6 width=165 onmouseover="clearhidemenu()" onmouseout="hidemenu()">'+which+'</layer>')
        menuobj.document.close()
    }
    menuobj.contentwidth=(ie4||ns6)? menuobj.offsetWidth : menuobj.document.gui.document.width
    menuobj.contentheight=(ie4||ns6)? menuobj.offsetHeight : menuobj.document.gui.document.height

    eventX=ie4? event.clientX : ns6? e.clientX : e.x
    eventY=ie4? event.clientY : ns6? e.clientY : e.y

    var rightedge=ie4? document.body.clientWidth-eventX : window.innerWidth-eventX
    var bottomedge=ie4? document.body.clientHeight-eventY : window.innerHeight-eventY
    if (rightedge<menuobj.contentwidth)
        menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX-menuobj.contentwidth+menuOffX : ns6? window.pageXOffset+eventX-menuobj.contentwidth : eventX-menuobj.contentwidth
    else
        menuobj.thestyle.left=ie4? ie_x(event.srcElement)+menuOffX : ns6? window.pageXOffset+eventX : eventX

    if (bottomedge<menuobj.contentheight&&mod!=0)
        menuobj.thestyle.top=ie4? document.body.scrollTop+eventY-menuobj.contentheight-event.offsetY+menuOffY-23 : ns6? window.pageYOffset+eventY-menuobj.contentheight-10 : eventY-menuobj.contentheight
    else
        menuobj.thestyle.top=ie4? ie_y(event.srcElement)+menuOffY : ns6? window.pageYOffset+eventY+10 : eventY
    menuobj.thestyle.visibility="visible"
    ie_dropshadow(menuobj,"#999999",3)
    return false
}

function ie_y(e){
    var t=e.offsetTop;
    while(e=e.offsetParent){
        t+=e.offsetTop;
    }
    return t;
}
function ie_x(e){
    var l=e.offsetLeft;
    while(e=e.offsetParent){
        l+=e.offsetLeft;
    }
    return l;
}
function ie_dropshadow(el, color, size)
{
    var i;
    for (i=size; i>0; i--)
    {
        var rect = document.createElement('div');
        var rs = rect.style
        rs.position = 'absolute';
        rs.left = (el.style.posLeft + i) + 'px';
        rs.top = (el.style.posTop + i) + 'px';
        rs.width = el.offsetWidth + 'px';
        rs.height = el.offsetHeight + 'px';
        rs.zIndex = el.style.zIndex - i;
        rs.backgroundColor = color;
        var opacity = 1 - i / (i + 1);
        rs.filter = 'alpha(opacity=' + (100 * opacity) + ')';
        fo_shadows[fo_shadows.length] = rect;
    }
}
function ie_clearshadow()
{
    for(var i=0;i<fo_shadows.length;i++)
    {
        if (fo_shadows[i])
            fo_shadows[i].style.display="none"
    }
    fo_shadows=new Array();
}


function contains_ns6(a, b) {
    while (b.parentNode)
        if ((b = b.parentNode) == a)
            return true;
    return false;
}

function hidemenu(){
    if (window.menuobj)
        menuobj.thestyle.visibility=(ie4||ns6)? "hidden" : "hide"
    ie_clearshadow()
}

function dynamichide(e){
    if (ie4&&!menuobj.contains(e.toElement))
        hidemenu()
    else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
        hidemenu()
}

function delayhidemenu(){
    if (ie4||ns6||ns4)
        delayhide=setTimeout("hidemenu()",500)
}

function clearhidemenu(){
    if (window.delayhide)
        clearTimeout(delayhide)
}

function highlightmenu(e,state){
    if (document.all)
        source_el=event.srcElement
    else if (document.getElementById)
        source_el=e.target
    if (source_el.className=="menuitems"){
        source_el.id=(state=="on")? "mouseoverstyle" : ""
    }
    else{
        while(source_el.id!="popmenu"){
            source_el=document.getElementById? source_el.parentNode : source_el.parentElement
            if (source_el.className=="menuitems"){
                source_el.id=(state=="on")? "mouseoverstyle" : ""
            }
        }
    }
}

if (ie4||ns6)
    document.onclick=hidemenu
function doSClick() {
    var targetId, srcElement, targetElement, imageId, imageElement;
    srcElement = window.event.srcElement;
    targetId = srcElement.id + "content";
    targetElement = document.all(targetId);
    imageId = srcElement.id;
    imageId = imageId.charAt(0);
    imageElement = document.all(imageId);
    if (targetElement.style.display == "none") {

        targetElement.style.display = "";
    } else {
        targetElement.style.display = "none";
    }
}
function doClick() {
    var targetId, srcElement, targetElement;
    srcElement = window.event.srcElement;
    targetId = srcElement.id + "_content";
    targetElement = document.all(targetId);
    if (targetElement.style.display == "none") {
        targetElement.style.display = "";
    } else {
        targetElement.style.display = "none";
    }
}
function overbg(tdbg){
    tdbg.style.background='url(Images/item_over.gif)'
    tdbg.style.border=' #B0690B 1px solid'
}
function outbg(tdbg){
    tdbg.style.background='url(.Images/item_out.gif)'
    tdbg.style.border=''
}
var sysmenu='<table width=80><tr><td id=library onMouseOver=overbg(library) onMouseOut=outbg(library)><a href="/library/get">图书馆信息</a></td></tr>\
<tr><td id=manager onMouseOver=overbg(manager) onMouseOut=outbg(manager)><a href="/manager/list">管理员设置</a></td></tr>\
<tr><td id=para onMouseOver=overbg(para) onMouseOut=outbg(para)><a href="/parameter/get">参数设置</a></td></tr>\
<tr><td id=bookcase onMouseOver=overbg(bookcase) onMouseOut=outbg(bookcase)><a href="/bookcase/list">书架设置</a></td></tr>\
</table>'
var readermenu='<table width=90><tr><td id=readerType onMouseOver=overbg(readerType) onMouseOut=outbg(readerType)><a href="/reader/type/list">读者类型管理</a></td></tr>\
<tr><td id=reader onMouseOver=overbg(reader) onMouseOut=outbg(reader)><a href="/reader/list">读者档案管理</a></td></tr>\
</table>'
var bookmenu='<table width=90><tr><td id=bookType onMouseOver=overbg(bookType) onMouseOut=outbg(bookType)><a href="/book/type/list">图书类型设置</a></td></tr>\
<tr><td id=book onMouseOver=overbg(book) onMouseOut=outbg(book)><a href="/book/list">图书档案管理</a></td></tr>\
</table>'
var borrowmenu='<table width=60><tr><td id=Borrow onMouseOver=overbg(Borrow) onMouseOut=outbg(Borrow)><a href="/send/bookBorrow">图书借阅</a></td></tr>\
<tr><td id=renew onMouseOver=overbg(renew) onMouseOut=outbg(renew)><a href=bookRenew.html>图书续借</a></td></tr>\
<tr><td id=giveback onMouseOver=overbg(giveback) onMouseOut=outbg(giveback)><a href=bookBack.html>图书归还</a></td></tr>\
</table>'
var querymenu='<table width=90><tr><td id=bookQuery onMouseOver=overbg(bookQuery) onMouseOut=outbg(bookQuery)><a href="/book/query">图书档案查询</a></td></tr>\
<tr><td id=borrowQuery onMouseOver=overbg(borrowQuery) onMouseOut=outbg(borrowQuery)><a href="borrowQuery.html">图书借阅查询</a></td></tr>\
<tr><td id=givebackQuery onMouseOver=overbg(givebackQuery) onMouseOut=outbg(givebackQuery)><a href="bremind.html">借阅到期提醒</a></td></tr>\
</table>'